Hints for evolution-common in xenial

evolution-common/3.18.5.2-0ubuntu1: evolution.desktop ⚙ amd64 ⚙ armhf ⚙ i386 ⚙ s390x ⚙ arm64 ⚙ ppc64el ⚙ powerpc

missing-desktop-file
Found an AppStream upstream XML file, but the associated .desktop file is missing. This often happens when the .desktop file is renamed, but the <id/> tag of the AppStream metainfo file is not adapted as well, or if the metainfo file is located in a different package than the .desktop file.
Please fix the packaging or work with upstream to resolve this issue.

ancient-metadata
The AppStream metadata should be updated to follow a more recent version of the specification.
Please consult the XML quickstart guide for more information.

description-from-package
This component gets its description from the package it is located in.
This has several disadvantages, like missing localization, possibly too short descriptions, too technical descriptions for users of software centers, etc.
Please consider writing a metainfo file for this component. In the near future, components without metainfo file might be dropped from the metadata. You can consult the XML quickstart guide for more information on how to write a metainfo file.

description-from-package
This component gets its description from the package it is located in.
This has several disadvantages, like missing localization, possibly too short descriptions, too technical descriptions for users of software centers, etc.
Please consider writing a metainfo file for this component. In the near future, components without metainfo file might be dropped from the metadata. You can consult the XML quickstart guide for more information on how to write a metainfo file.